Burner



Marbh 16 192s.

G. LEICH BURNER 4 Sheets-Sheet 1 Filed August 6, 1924 W Fm m I INVENTOR [Icarye L ezcfi 2 BY A A'ITORNE? G. LEIGH March 16 1926 BURNER Filed August 6. 1924 4 Sheets-Sheet 5 INVENTOR adiffi Le ccii A BY L 4MW ATTORMEY March 16 1925.

G. LEICH BURNER Filed August 6. 1924 4 Sheets-Sheet 1L INVENTOR Qeofiye Lezo/I W Patented Mar. 16, 1926.

UNITED STATES GEORGE LEIGH, or RocKvI LEoENTER, NEW YonK.

BURNER.

Application filed August 6, 1924. Serial No. 730,351.

' To all whom it may concern:

Be it known that I, Grnonon LEIGH, a citizen of the United States, and residing at Rockville Center, L. I., in the county of Nassau and State of New York, have invented certain new and useful Improvements in Burners, of which the following is a specification, such as will enable those skilled in the art to which it appertains to make and use the same.

This invention relates to burners and particularly to devices for use in connection with or as a part of heating apparatus of various kinds and classes, such for example as steam boilers, hot water boilers, hot air furnaces and the like; and the object of the invention is to provide a device or apparatus of the class specified which is so constructed as to permit of the ready adaptation thereof in connection with heating apparatus commonly known and now in use, without material change or alterations in the structure of the heating apparatus; a further object being to provide means for feeding the fuel to the burner device by the velocity of flow of steam around and by the fuel oil nozzle of the apparatus; a further object being to so circulate the fuel oil and steam through the burner device as to form of said elements a desirable gaseous mixture which when ignited, produces a flame having the highest possible degree of heat; a further object being to provide a burner composed of a plurality of substantially similar elements coupled together to form the device, and with means for supporting a steam boiler within said elements, said elements being preferably in the form of tubular members and means for placing the separate tubular members in communication; a-further object being to provide-means independent of the burner nozzles for initially heating the water in said boiler and for generating steam therein; a further object being to provide r means for maintaining a fixed level of water in the boiler and for automatically replenishing the supply of water thereto; a still further object being to provide means for automatically and positively controlling the supply of fuel to the burner whereby the overflow or flushing of the fuel oil is obviated; and with these and other objects in view, the invention consists in an apparatus of the class and for the purpose specified, which is simple in construction, eflicient in use, and which s constructed as hereinafter described and claimed. y

The invention is fully disclosed in' the followmg specification, of which the accompanying drawing forms a part, in which the separate parts of my improvement are designated by suitable reference characters in each of the views, and in which 2- i I Fig. 1 is a diagrammatic View showing my lmproved burner mounted in the lfire box of a furnace, and illustrating the several parts of the apparatus employed reconnection with the burner. l

Fig. 2 is a longitudinal sectional view through the burner shown in Fig. 1 with parts of the construction omitted and on an enlarged scale. I

Fig. 3 is a sectional plan view ofthe burner proper, parts of the construction belng broken away and in section. Y

Fig. 4 is a sectional detail view of a part of the construction shown in Figs. 1 and 2 of the drawing. i

Fig. 5 is a transverse sectional view through the burner device, adjacent one end portion thereof. f

Fig. 6 is an end View of the burner, showing one end portion thereof. g p Fig. 7 is a view similar to Fig. 6 but showing the other end portion of the burner.

Fig. 8 is a sectional detail view of apart of the construction shown in. Fig. 1; and,

Fig. 9 is a sectional detail view of a fuel and steam nozzle which I employ.

In Fig. 1 of the drawing, I have indicated at 10 a.furnace of a steam system for the purpose of illustrating one use'of my invention, and in said figure 11 represents the fire box, 12 the grate, 13 the fire box door, 14 the draft door and 15 the clinker door opening which in the useof my improved burner is closed by a wall member 16 through which certain pipes and the like are adapted to pass.

It will be noted thatmy improved burner 17 may be mounted upon the grate 12 of the furnace-as indicated in Fig. 1 of the drawing, or the burner may be supported in the furnace in any desired manner. In Fig. 1, I have also indicated at 18 an oil tank, 19 a shut-off valve, 20 a feed control valve. 22 represents what is known. as a whistle valve controlled by a diaphragm valve23.

llfi

the valve 22 being mounted in the oil feed pipe 24 through the tank 18. i 25 represents a water feeder placed in communication with a suitable source of water supply through a pipe 26 having a valve 27 therein, and at 28 I have'indicated a gas feed pipe from a suitable source of gas supply, in

which is a controlling valve 29, and adjustable air regulator 30.

The mechanisms above described are placed in communication with the burner 17 in the manner hereinafter set out, and in the accompanying drawing, the burner is constructed of a series of substantially yokeshaped tubular sections 31, all of which are practically of the same general construction or consist of the top V-shaped' tubular cross head 32, depending side tubular members and inwardly directed tubular members terminating in circular coupling heads 33 which. are enlarged laterally as clearly seen in Fig. 3 of the drawing and these coupling heads are adapted to be coupled together by two types of tubular unions or coupling members 34 and 35, the unions 34 being open throughout while the unions 35 have partition walls tansversely thereof forming closures for sealing the communication between adjacent sections 31.

In the construction shown, seven of the sections 31 are employed, and one of the end sections, the end section -to the right as shown in. Figs. 1, 2. and 3 of the drawing, and one of the inwardly directed end portions thereof, the end portion to the left as viewed in Fig. 7 of the drawing, is threaded to receive a pipe 36, while the other end of said section is closed by a plug 37. The other end section, namely that to the left in the above named figures or the end member to the left thereof as viewed in Fig. 6 of the drawing, isthreaded to receive a pipe 38, while the other end is closed by a plug 39. The sections 31 are coupled together by the couplings or unions 34 and 35 which are pressed in position forming substantially a unitary structure of the. sections employed. To one end of said sections is secured a plate which is of the general form indicated in Fig. 7 of the drawing, and to the other end is secured a plate 41 of the general form shown in Fig. 6 of the drawing. Three burner tubes 42 are mounted longitudinally of theburner at a predetermined distance beneath the sections 31, said tubes passing through the plate 41 andhaving a bearing in the plate 40, and two gas burner tubes 43 are passedthrough the plate 40 and have bearings in the plate 41, said last named tubes being positioned above the central burner tube 42 and within the sections 31 central-1y thereof.

Formed within and around the sections 31 is. acombustion chamber which opens outwardly through the separate sections 31 at the top, bottom and sides thereof, and cen trally of said chamber and said sections is a steam boiler 44 which extends longitudinally of the burner and which, in the construction shown, is of the cross sectional form indicated in 5 of the drawing, said boiler being supported by cross members 45 coupled with standards 46 forming part of the sections 31 as clearly shown in Figs. 5 and 6 and 7 of the drawing, the

boiler 44 being provided at the top of the front end portion thereof with an upwardly and outwardly directed box-shaped extension 47 forming a steam chest 48, and an inwardly and downwardly tapered bafile wall 49 extends into the boiler adjacent the communication between it and the steam chest 48 and forms a contracted discharge 50 between the boiler and steam chest. The

baflie wall prevents water from coming into 23 through a branch 52 of the pipe 52 as shown in Fig. 1 of the drawing. Another pipe 53-is in communication with the steam chest 48 and is coupled with a fuel feeding device 54 shown in Figs. 1, 3 and 7 and in detail in Fig. 9 of'the drawing.

The fuel feeding device is mounted in connection with the pipe 36 and has a discharge port 55 opening into said pipe 36, and mounted in the device 54 is an adjustable nozzle 56 retained in predetermined positions of adjustment by a lock nut 57, said nozzle comprising a large upper chamber 58 with which the oil feed pipe 24 from the valve 22communicates, and a contracted discharge port 59 in the contracted end por tion 60 of the nozzle 56, said end portion 60 extending into the nozzle discharge port 55 of the device 54. lVithin the device 54 around the nozzle 56 is a chamber 61 into which steam is adapted to pass from the pipe 53, which communicates with said chamber, see Fig. 9, and the velocity of steam flow around the contracted end 60 of the nozzle 56 willrontrol the feed of oil into the pipe 36 through the discharge port 59 of the nozzle 56.

The water feeding device 25 for supplying water, automatically to the boiler 44, to maintain a fixed level therein is shown and described herein to clearly illustrate the complete apparatus, but this water feeding device initself forms the subject of and is claimed in a companion application filed August 6, 1924, Serial. No. 730,350. For convenience, the device 25 is mounted and supported on the gas feed pipe 28 and as shown said devicevcomprises a dome-shaped casing 62 closed at its upper end and the lower end ,of which is open and adapted tobe closed by a cap 63. Mounted in connection withthe cap 63 is a pivot bar 64 in connection with which a lever 65 is pivoted, one end of said lever being pivoted to a float 66 and a link 67 is pivoted to the other end of'said lever, said link being pivoted to the long arm of a lever 68 pivoted to a post 69 mounted on the cap 63, and the short arm 70 of the lever 68 is adapted to operate in connection with a pin 71 for moving a needle valve 72 into inoperative position. The needle valve 72 is movably mounted in a plug member 73 coupled with the cap 63, the needle valve being tapered at a predetermined point to operate in connection with a tapered seat 74 to control the supply of water into the casing 62 from the water supply pipe 26 by the passage of said water through the bypass port or passage 75 in the plug 73 around the needle valve 72, when unseated, and into said casing through ports 76 as clearly shown in F 4 of the drawing, it being understood that sulficient clearance is allowed around said needle valve to permit the passage of water into the casing 62 when said valve is unseated, this clearance being very slight however.

The water feeding device, it will be apparent, operates to automatically maintain a fixed level in the steam boiler 44 as is diagrammatically shown in Fig. 2 of the drawing. hen the water level drops in the casing 62, the float 66 will drop thus operating the levers 65 and 68 to depress the pin 71 and unseat the needle valve 72, and when the proper level has been reached the needle valve 72 will be reseated by the pressure of water, especially in that the end portion of the needle valve'is subject to the direct water pressure, and the by-pass 7 5 functioning only to relieve or partially equalize the pressures to eliminate the use of-a large float for actuating the needle valve against the prevailing water pressure.

It will be noted that the gas supply pipe 28 is coupled witha substantially T-shaped body 77 forming part of the plate 40 of the burner and the gas burner pipes 43 are in comn'mnication with the end portions of the member 77. The gas and air mixture in the pipe 28 is discharged through the burner tubes 43 substantially as is diagrammatically illustrated in Fig. 5 of the drawing, or in directions at an angle to the vertical plane of the burner to direct the flame from said burner tubes 43 against the boiler, and the tubular sections 31 adjacent the boiler. It will be understood that water has been placed in the boiler, and in the operation of the burner tubes 43, the water in the boiler will be heated, in a matter of a few minutes, to a point where steam wlll be generated and this steam will be discharged into the steam chest48 and will pass through the pipes 52 and 53, the comnumicationof the pipe 52 with the water feeder serving to equalize'the pressure on the body of water therein, and in the boiler, and the passage of the steam from the pipe 52 to a diaphragm control 23 will operate to automatically actuate the whistle valve 22 to place the tank 18 in communication with the fuel feeding device 54, it being understood that the valves 19 and 20 are in open and adjusted positions. The steam in the steam chest 48 also passes to the chamber 61 of the device 54 through the pipe 53, and the velocity of steam flow around the nozzle 56 or the contracted endportion 60 thereof will control and regulate the feed of fuel from the tank 18 into and through the tubular sections 31.

At this point, it may be stated that while I have shown in full lines in Fig. 1 of the drawing, a substantial gravity feed to the fuel feeding device 54 from the tank 18, the fuel may be drawn by the vacuum created in the steam velocity flow to raise fuel from a tank at a lower level as indicated in dotted lines in said figure. Regardless of the system employed for supplying the fuel, the fuel in comparatively small proportions is mixed or mingled with the steam discharge into the pipe 36, and this mixture passes into the first section of the burner at the left, see Fig. 7, through said section and into the adjacent section at the right when viewing the sections as in Fig. 7, thus through the second section and into the third section at the left, and so on until the same has been discharged from the last section into; the pipe 38, see Fig. 6 of the drawing. The pipe 38 is directed upwardly and then downwardly and is coupled with a three-way manifold 78 through a T-shaped coupling 79, see Fig. 2 of the drawing, and in said pipe and coupling is placed a nozzle 80 which is designed to increase the velocity flow at or within the T-shaped coupling 79 which has a downwardly directed elbow 81 opening to atmosphere, whereby air may be entrained into and mingled with the gaseous substance discharged into the manifold 78 through the nozzle 80, and the gasthus formed passes from the manifold 78 into and through the burner tubes 42 and is discharged through nozzles or discharge ports spaced longitudinally thereof, and the arrangement is diagrammatically illustrated in Fig. 5 of the drawing, and is such as to direct the flame from the burner tubes 42 onto the sections 31 as well as onto the boiler 44. It will be understood, when sufiicient steam has been generated by the gas burner tubes 43, the gas supply may be shut off through the valve 29 and the steam may contin'iie to be generated by the action of the burner tubes 42 only.

The passage of the steam and fuel oil mixture into and through the tubular sections 31 which are heated to a high degree of heat,- acts upon said elements to produce thereof a gas which I find to be most suitable and conveniriit for burners of the class under consideration. As a matter of fact the gas discharged from the burner tubes 42 produces the highest possible degree of heat with a minimum fuel consumption; I have also found that no carbon deposits or scales collect upon the several parts of the burner proper, and the burner will operate eificiently at a nominal cost Without any care or attention. However, in the event that the burner tubes 42 or the flame thereof, should go out through any cause whatever and the steam ceaseto be generated,- the diaphragm control valve 23' will operate to autoi'natically shut off the supply of fuel to prevent the flooding or flushing of the burner tubes, especially if a gravity feed is employed, and in Fig. 8 of the drawing, I have illustrated a detail viewof the valves 22 and 23 to illustrate that the diaphragm 23 of the valve 23 operates upon a rod 23*, which extends into the valve 22 and is adapted to operate the valve element 22 thereof, the diaphragm 23 being actuated by the steam pressure to Which it is sub jected. The valve 20 employed in the feed pipe 24 is used to control the amount of oil supplied to the burner, and by means of this valve the degree of heat desired in the use of my improved burner may be regulated.

In Fig. 1 of the accompanying drawings, the pipes 241', 28, 51 and 52 are passed through the walls 16 employed for closing the clinker door opening,- but I am not necessarily limited to this specific construction as the pipes may be passed into a furnace or other heatelement in any desired manner, and the burner may be mounted within the furnace in any Way, or as hereiiib'efore stated, the furnace may be constructed to adapt the burner primarily thereto, and While I have shown certain details of construction for carrying my improved apparatus into effect and have shown a specific number of sections 31 in the burner proper and other structural details, it will be understood that I am not necessarily limited in these respects, and Various changes in and modifications of the construction herein shown and described may be made Within the scope of the appended claims without departing from the spirit of my invention or sacrificing its advantages.

Having fully described my invention, What I claim as new and desire to secure by Letters-Patent, is 5- v I. An apparatus of the class described comprising a burner unit composed of a plurality of intercommunicating passages, means in said unit whereby steam may be generated, means for initially heating said first named means to generate steam, means for utilizing the steam so generated to contrial the supply of fuel to the burner, means for circulating the steam and fuel through the passages of the burner to form thereof a combustible gas and for directing said gas to the discharge tubes of the burner unit, means whereby the burner unit may, when in operation, be utilized to generate steam in said first named means, and means for supplying air to the gas.- prior to its admission into the tubes of the burner unit.

2; An a ')paratus of the class described comprising a burner unit composed of a plurality of interrommunieating passages, means in said unit whereby steam may be generated, means for initially heating said first named means to generate steam,- means for utilizing the steam so generated to control the supply of fuel to the burner,- means for circulating the steam and fuel through the passages of the burner to form thereof a coi'nbustible gas and for directing said gas to the discharge tubes of the burner unit, means whereby the burner unit may, when in operation, be utilized to gei'ierate steam in said first named means, means for supplying air to the gas, prior to its admission into the tubes of the burner unit, and means for automatically controlling the supply of Water to the first named means.

3. An apparatus of the class described con'ipr'i'sing a burner unit composed of a plurality of intercommunicating passages, means in said unit whereby steam may be generated, means for initially heating said first named means to generate steam, means for utilizing the steam so generated to control the supply of fuel to the burner, means for circulating the steam and fuel through the passages of the burner to form thereof a combustible gas and for directing said gas to the discharge tubes of the burner unit, means whereby the burner unit may, when in operation, be utilized to generate steam in said first named means, means for supplying air to the gas, prior to its admission into the tubes of the burner unit,- means for automatically controlling the supply of Water to the first named means, and for maintaining a fixed Water level therein.

4. An apparatus of the class described comprising a burner unit composed of a plurali ty of intercol'nmunicating passages, means in said unit whereby steam may be generated, means for initially heating said first named means to generate steam, means for utilizing the steam so generated to control the supply of fuel to the burner, means for circulating the steam and fuel through the passages of the burner to form thereof a combustible gas and for directing said gas to the discharge tubes of the "burner "unit",

means whereby the burner unit may, When in operation, be utilized to generate steam in said first named means, means for supplying air to the gas, prior to its admission into the tubes of the burner unit, means for automatically controlling the supply of water to the first named means and for n'iaintaining a fixed water level therein, and means in communication with said first named n'iean's for automatically controlling the supply of fuel to theliurner unit.

5. An apparatus of the class described comprising a burner unit composed of a plurality of intercommunicat'ing passages, means in said unit whereby steam may be generated, means for initially heating said first named means to generate steam, means for utilizing the steam so generated to control the supply of fuel to the burner, means for circulating the steam and fuel through the passages of the burner to form thereof a combustible gas and for directing said gas to the discharge tubes of the burner unit, means whereby the burner unit may, when in operation, be utilized to generate steam in said first named means, means for supplying air to the gas, prior to its admission into the tubes of the burner unit, means for automatically controlling the supply of Water to the first named means and for maintaining a fixed water level therein, means in communication with said first named means for automatically controlling the supply of fuel to the burner unit, and means for controlling the volume of the fuel supply.

6. An apparatus of the class described comprising a burner unit, means in said unit whereby steam may be generated, means for initially heating said first named means to generate steam, means for utilizing the steam so generated to control the supply of fuel to the burner, means for circulating the steam and fuel through the burner to form thereof a combustible gas and for directing said gas to the discharge tubes of the burner unit, means whereby the burner unit may, when in operation, be utilized to gencrate steam in said first named means, means for supplying air to the was prior to its admission into the tubes 0' the burner unit, means for automatically controlling the sup ply of water'to the first named means and for maintaining a fixed water level therein, means for controlling the volume of he fuel supply, and an adjustable fuel nozzle constituting part of said fuel. supply means.

7.1 m apparatus of the class described comprising a burner unit, means in said unit whereby steam may be generated, means for initially heating said first named means to generate steam, means for utilizing the steam so generated to control the supply'of fuel to the burner, means for circulating the steam and fuel through the burner to form thereof a combustible "gas and "for directing said gas to the "discharge tubes of the burner unit, means whereby the burner unit may, when in operation, be utilized to generate steam in said first namedmeans,

means for supplying air to the gas prior to its admission into the tubes of the burner unit,"means for automatically controlling the supply of water to the first named means and for maintaining" a fixed water level therein, means for controlling the volume of the fuel supply, and adjustablefuel nozzle constituting part of said fuel supply means, and means for subjecting said nozzle'to the velocity ofsteam flow into the burner unit.

8. An apparatus *of the class described comprising a burner unit comprising a plurality of intercommunicating' tubular sections, a fuel nozzle in communication with the inlet end of said tubular sections, a fuel supply tank in communication with said nozzle, a steam boiler constituting partof said burner unit and located -within said tubular sections, means for p assingsteam generated bysaid boiler around said nozzle to control the feed of oil to saidbu'rnerunit, and means whereby the steam and oil may be circulated through the tubular section of the burner unit to form thereof a vgas, which is directed to the burner tubes of said "unit.

9. An apparatus of the class described comprising a burner unitcomprising a plurality of intercommunicating tubular sections, a fuel nozzle in communication with the inlet end of said tubular sections, a fuel supply tank in communication with said nozzle, a steam boiler constituting part 'of said burner unit and located within said tubular sections, means for passing steam generated by said boiler around said nozzle to control. the feed of oil to said burner unit, means whereby the steam and oil may be circulated through the tubular sections of the burner unit to form thereof a gas, which is directed to the burner tubes of said unit, and means whereby air may be mingled with saiod gas prior to its passage into said burner tu e 10. An apparatus of the class described comprising a burner unit comprising a plurality of intercommunicating tubular sections, a fuel nozzle in communication with the inlet end of said tubular sections, a fuel supply tank in communication. with said nozzle, a steam boiler constituting part of said burner unit and located within said tubulai sections, means for passing steam generated by said boiler around said nozzle to control the feed of oil to said burner unit, means whereby the steam and oil may be circulated through the tubularsections'of the burner unit to form thereof a gas,"wliich is directed to the burner tubes of said unit, leans whereby air may be mingled with saidgas prior to its passage into said burner tubes, and means in communication with said boiler forv automatically controlling the supply of oil to said nozzle.

11. An apparatus of he class described comprising a burner unit comprising a .plurality of intercommunicating tubular sections, a fuel nozzle in communication with the inlet end of said tubular sections, a fuel supply tank in communication with said nozzle, a steam boiler constituting part of said burner unit and located within said tubular sections, means for passing steam generated by said boiler around said nozzle to control the feed of oil to said burner unit, means whereby the steamvand oil may be circulated through the tubular sections of the burner unit to form thereof gas, ivhich is directed to the burncrt-ubes of said unit, means whereby air may be mingled with said gas prior to its passage into said bur.- ner, tubes, meansin communication with said boiler for automatically controlling the supply of oil to said nozzle and other means in communication with said boilerfor controlling the supply of water thereto and for maintaining a predetermined water level therein.

12. An apparatus of the class described comprising a burner unit comprising a plurality of intercommunicating tubular sections, a fuel nozzle in communication with the inlet end of said tubular sections, a fuel supply tank in communication with said nozzle, a steam boiler constituting part of said burner unit, means for passing steam generated by said boiler around said nozzle to control the feed of oil to said burner unit, means whereby the steam and oil may be circulated through the tubular sections of the burner unit to form thereofa gas, which is directed to the burner tubes of said unit,

means whereby air may be mingled with aid gas prior to its passage into said burner tubes, means in communication with Said boiler for automatically controlling the supply ofoil to. said nozzle, other means in communication with said boiler for controlling the supply. of water thereto and for maintaining a predetermined water level therein, and means for regulating the volume of fuel supply to; said nozzle.

1-3. An apparatus of the class described comprising a burner unit comprising a plurality of' intercommunicating tubular sections, a fuel nozzle in communication with the inlet end of said tubular sections, a fuel supply tank in communication with said nozzle, a steam boiler constituting part of said burner unit and located within said tubular sections, means for passing steam generated by said boiler around said nO rZle to control the feed of oil to said burner unit, means whereby the steam and oil may be circulated through the tubular sect-ions of the burner unit to form thereof a gas, which is directed to the burner tubes of said unit, means, whereby air may be mingled with said gas prior to its passage into said burner tubes, means in communication with said boiler for automatically controlling the supply of oil to said nozzle, other means in communication with said boiler for controlling the supply of water thereto and for maintaining a predetermined water level therein, means for regulating the volume of fuel supply to said nozzle, and means independent of the tubes of the burner unit for initially heating said steam generator.

14:. A burner of the class described com prising a plurality of tubular sections in communication one with the other, burner tubes in juxtaposition to and beneath said sections and in communication therewith, means for passing steam and fuel oil into and through the sections of said burner to form thereof a combustible gas and for directing said gas to said burner tubes, means for mingling air with the gas prior to the passage thereof into said burner tubes, and means for automatically controlling the supply of fuel to the sections of said burner.

15. A burner of the class described com prising a plurality of independent and substantially similar tubular sections in communication one with the other, burner tubes in juxtaposition to and beneath said sections and in communication therewith, a steam boiler associated with said sections and said burner tubes, a nozzle device in communication with said sections, said device being in communication with said steam generator and with a fuel oil supply, means whereby steam from said generator will control the feed of oil into said sections through said nozzle device, said steam and fuel being circulated through said sections to form thereof a combustible gas adapted to be discharged from the tubes of said burner, and means whereby air may be entrained into said in its passage from said sections to said burner tubes.

1-6, A burner of the class described comprising a plurality of substantially similar tubular sections in comnnmication one with the other, burner tubes in juxtaposition to and beneath said sections and in communication therewith, a steam boiler associated with said sections and said burner tubes, nozzle device in communication with said sections, said device being in communication with said steam generator and with a fuel oil supply, means whereby steam from said generator will control the feed of oil into said sections through said nozzle device, said steam and fuel being circulated through said sections to form thereof a combustible gas adapted to be discharged from the tubes of said burner, means whereby air may be entrained into said gas in its passage from said sections to said burner tubes, and means for automatically maintaining a constant water level in said generator.

17. A burner of the class described comprising a plurality of substantially similar tubular sections in communication one with the other, burner tubes in juxtaposition to and beneath said sections and in communication therewith, a steam boiler associated with said sections and said burner tubes, a nozzle device in communication with said sections, said device being in communication with said steam generator and with a fuel oil supply, means whereby steam from said generator will control the feed of oil into said sections through said nozzle device, said steam and fuel being circulated through said sections to form thereof a combustible gas adapted to be discharged from the tubes of said burner, means whereby air may be entrained into said gas in its passage from said sections to said burner tubes, means for automatically maintaining a constant water level in said generator, and means in communication with said generator for automatically controlling the supply of fuel to the nozzle device.

18. A burner of the class described comprising a plurality of substantially similar tubular sections in communication one with the other, burner tubes in juxtaposition to and beneath said sections and in communication therewith, a steam boiler associated with said sections and said burner tubes, a nozzle device in communication with said sections, said device being in communication with said steam generator and with a fuel oil supply, means whereby steam from said generator will'control the feed of oil into said sections through said nozzle device, said steam and fuel being circulated through said sections to form thereof a combustible gas adapted to be discharged from the tubes of said burner, means whereby air may be entrained into said gas in its passage from said sections to said burner tubes, means for automatically maintaining a constant water level in said generator, means in communication with said generator for automatically controlling the supply of fuel to the nozzle device, and means for initially heating said steam boiler to generate steam in starting the burner operation.

.19. A burner of the class described comprising a plurality of substantially similar tubular sections in communication one with the other, burner tubes in juxtaposition to and beneath said sections and in communication therewith, a steam boiler associated with said sections and said burner tubes, a nozzle device in communication with said sections, said device being in communication with said steam generator and with a fuel oil supply, means whereby steam from said generator will control the feed of oil into said sections through said nozzle device, said steam and fuel being circulated through said sections to form thereof a combustible gas adapted to be discharged from the tubes of said burner, means whereby air may be en trained into said gas in its passage from said sections to said burner tubes, means for automatically maintaining a constant water level in said generator, means in communication with said generator for automatically controlling the supply of fuel to the nozzle device, means for initially heating said steam boiler to generate steam in starting the burner operation, and an adjustable valve for regulating the feed of oil to the automatic means and said nozzle.

20. A burner of the class described comprising a plurality of substantially U-shaped tubular sections mounted side by side, means for coupling said sections together and for placing the chambers thereof in communication to form a continuous coil from one end of the burner to the other, a fuel nozzle in communication with one of the end sections of the burner, burner tubes in communication with the other end section whereby fuel from said nozzle passes through said sec tions prior to its discharge through the burner tubes, a steam boiler mounted longitudinally of and within said sections, and means for placing said steam boiler in communication'with said fuel nozzle whereby the steam generated by said boiler will control the entrainment of fuel into said sec tions and whereby said fuel and steam will be converted into a combustible gas in its passage through said sections.

21. A burner of the class described comprising a plurality of substantially U-shaped tubular sections mounted side by side, means for coupling said sections together and for placing the chambers thereof in communication to form a continuous coil from one end of the burner to the other, a fuel nozzle in communication with one of the end sections of the burner, burner tubes in communication with the other end section whereby fuel from said nozzle passes through said sections prior to its discharge through the burner tubes, a steam boiler mounted longitudinally of and within said sections, means for placing said steam boiler in communication with said fuel nozzle whereby the steam generated by said boiler will control the entrainment of fuel into said sections and whereby said fuel and steam will be con verted into a combustible gas in its passage through said sections, and air admission means between the discharge of said sections and said burner tubes.

252,. A burner of the class described comprising a plurality of substantially U- shaped tubular sections mounted side by side, means for coupling said sections together and for placing the chambers thereof in communication to form a continuous coil from one end of the burner to the other, a fuel nozzle in communication with one of the end sections of the burner, burner tubes in communication with the other end section whereby fuel from said nozzle passes through said sections prior to its discharge through the burner tubes, a steam boiler mounted longitudinally of and within said sections, means for placing said steam boiler in communication with said fuel nozzle whereby the steam generated by said boiler will control the entrainment of fuel into said sections and whereby said fuel and steam will be converted into a combustible gas in its passage through said sections, air admission means between the discharge of said sections and said burner tubes, and a gas burner tube mounted in said sections and beneath said steam boiler by means of which steam may be initially generated.

23. A burner of the class described comprising a plurality of substantially U- shaped tubular sections mounted side by side, means for coupling said sections together and for placing the chambers thereof in communication to form a continuous coil from one end of the burner to the other, a fuel nozzle in communication with one of the end sections of the burner, burner tubes in communication with the other end section whereby fuel from said nozzle passes through said sections prior to its discharge through the burner tubes, a steam boiler mounted longitudinally of and within said sections, means for placing said steam boiler in communication with said fuel nozzle whereby the steam generated by said boiler will control the entrainment of fuel into said sections and whereby said fuel and steam will be converted into a combustible gas in its passage through said sections, air admission means between the discharge of said sections and said burner tubes, gas burner tubes mounted in said sections and beneath said boiler by means of which steam may be initially generated, and means for automatically maintaining a fixed water level in said boiler.

24. A burner of the class described comprising a plurality of substantially U- shaped tubular sections mounted side by side, means for coupling said sections together and for placing the chambers thereof in communication to form a continuous coil from one end of the burner to the other, a fuel nozzle in communication with one of the end sections of the burner, burner tubes in communication with the other end section whereby fuel from said nozzle passes through said sections prior to its discharge through the burner tubes, a. steam boiler mounted longitudinally of and within said sections, means for placing said steam boiler in communication with said fuel nozzle whereby the steam generated by said boiler will control the entrainment of fuel into said sections and whereby said fuel and steam will be converted into a combustible gas in its passage through said sections, air admission means between the discharge of said sections and said burner tubes, gas burner tubes mounted in said sections and beneath said boiler by means of which steam may be initially generated, means for automatically maintaining a fixed water level in said boiler, and an automatic valve for controlling the supply of fuel to said nozzle device.

25. A burner of the class described comprising a plurality of substantially U-shaped tubular sections mounted side by side, means for coupling said sections together and for placing the chambers thereof in communication to form a continuous coil from one end of the burner to the other, a fuel nozzle in communication with one of the end sections of the burner, burner tubes in communication with the other end section whereby fuel from said nozzle passes through said sections prior to its discharge through the burner tubes, a steam boiler l mounted longitudinally of and within said sections, means for placing said steam boiler in communication with said fuel nozzle whereby the steam generated by said boiler will control the entraimnent of fuel into said sections and whereby said fuel and steam will be converted into a combustible gas in its passage through said sections, air admission means between the discharge of said sections and said burner tubes, gas burner tubes mounted in said sections and beneath said boiler by means of which steam may be initially generated, means for automatically maintaining a fixed water level in said boiler, an automatic valve for controlling the supply of fuel to said nozzle device, said valve being in communication with the steam boiler.

26. A burner of the class described comprising a plurality of independent and substantially U-shaped tubular sections, the crossheads of which forming an overlying dome for the burner, and the end portions of said tubular sections extending downwardly and inwardly beneath the dome of said sections, means for coupling the free end portions of said sections together and for placing the chambers thereof in communication to form a continuous coil of said sections from one end of the burner to the other, and burner tubes beneath said tubular sections and in communication therewith at one end of the coil formed by said sections.

27. A burner of the class described comprising a plurality of independent and substantially U-shaped tubular sections, the crosshead of which forming an overlying dome for the burner, and the end portions of said tubular sections extending downwardly and inwardly beneath the dome of said sections, means for coupling the free end per-- tions of said sections together and for placing the chambers thereof in communication to form a continuous coil of said sections from one end of the burner to the other, burner tubes beneath said tubular sections and in communication therewith at one end of the coil formed by said sections, and a boiler mounted within the dome portion and end portions of said sections and above said burner tubes.

28. A burner of the class described comprising a plurality of independent and substantially U-shaped tubular sections, the crosshead of which forming an overlying dome for the burner, and the end portions of said tubular sections extending downwardly and inwardly beneath the dome of said sections, means for coupling the free end portions of said sections together and for placing the chambers thereof in conr munication to form a continuous coil of said sections from one end of the burner to the other, burner tubes beneath said tubular sections and in communication therewith at one end of the coil formed by said sections, a boiler mounted within the dome portion and end portions of said sections and above said burner tubes, and the arrangement of said burner tubes being suchjas to distribute the heat rising therefrom when the burner is in operation over the entire area of the coil formed by said tubular sections and said boiler.

29. A burner of the class described comprising a plurality of tubular sections in communication one with the other, burner tubes in juxtaposition to and beneath said sections and in communication therewith, and means for passing steam and fuel oil into and through the sections of said burner to form thereof a combustible gas and for directing said gas to said burner tubes, and means for mingling air with the gas prior to the passage thereof into said burner tubes.

In testimony that I claim the foregoing as my invention I have signed my name this 1st day of August 1924.

GEORGE LEIGH. 

